Re: spin_unlock optimization

[Marc Lehmann]

On Thu, Dec 30, 1999 at 07:19:58PM +0100, Rik van Riel <[e-mail]> wrote:
> Self-modifying code?
> /me runs

Well, it depends on how you view it. Almost all user mode code is, in
fact, "self-modifying" if you view relocation and (to a lesser extent)
weak symbols as some kind of "self-modifying code" (remember how fp fixup
was done ages ago on x86?).

The exception mechanism in the kernl is another "globally visible" feature,
that has nothing to do with code-modification, but requires deeper knowledge
about the architecture.

I do not propose this solution, but it shouldn't be dismissed without
thinking ;->

(The requirement to add superfluous nops would be reason to dismiss it,
though ;)

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